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''Handroanthus heptaphyllus'',〔(''Handroanthus heptaphyllus'' ) at Germplasm Resources Information Network〕 is a Bignoniaceae tree native to southern America. It is also known as Black Lapacho (lapacho negro), or tajy. It grows in the high forest watershed of the Paraná River , Paraguay River , and Uruguay River. It has a limited distribution, almost exclusively inhabiting the low lands with wet and deep soils, where it forms part of the upper stratum. It is very rare in other microenvironments.  It is the national tree of Paraguay, declared as such in Nº4631 Act of May 10, 2012, as proposed by the School of Chemical Sciences, Universidad Nacional de Asunción. ==Description== It is a very tall tree, growing up to 40 m in height. The leaves are 10-15 cm long, trifoliate with elliptical serrated leaflets. The trunk long, cylindrical, and stately. The bark is brown-gray, very rough, with deep cracks in adult specimens. The crown is hemispherical with open fan branches. Semi-persistent foliage. Leaves opposite, palmate, with 5-7 leaflets. The tree is semi-deciduous with purple/pink tubular flowers appearing before the leaves. The flowers can vary in color from bright pink to pale pink or even white. The trees are very scenic when in bloom. The fruit is a linear pod up to 30-40 cm long and 1-1.5 cm wide, brown when ripe, opening longitudinally into two leaflets and dropping some 150 winged seeds. Flowering begins in the first half of September; approximately 30 days after the first leaves appear, with the seed pods ripening in January-February. The tree is very decorative, and is frequently used in parks, squares and public woodland. It withstands high winds and has a strong and deep root system. The tree is very demanding in terms of light and humidity, and is susceptible to frost when young. It prefers light, deep, moist soil. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Handroanthus heptaphyllus」の詳細全文を読む スポンサード リンク
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